package com.quan.server;

import java.util.List;
import java.util.Vector;

public class Main {
    public static void main(String[] args) {
        List<String> list = new Vector<>();
        list.add("aaaa");
        System.out.println(list);
        list.add(0, "bbb");
        System.out.println(list);
        list.add("cccc");
        System.out.println(list);
    }
}
